body {
    font-family: 'Helvetica Neue', Arial, sans-serif;
    color: #212529;
    background-color: #f8f9fa;
}

h1, h2, h3, h4, h5, h6 {
    font-family: Georgia, serif;
}

.navbar {
    transition: background-color 0.3s ease-in-out;
}

.navbar-sticky {
    background-color: rgba(255, 255, 255, 0.95);
    box-shadow: 0 2px 4px rgba(0,0,0,.04);
}

.hero {
    color: white;
    padding: 12rem 0;
    background: linear-gradient(45deg, rgba(13, 110, 253, 0.7), rgba(13, 110, 253, 0.9)), url('https://picsum.photos/seed/hero/1600/900') no-repeat center center;
    background-size: cover;
}

.hero h1 {
    font-size: 4.5rem;
    font-weight: bold;
}

.section {
    padding: 6rem 0;
}

.card {
    border: none;
    box-shadow: 0 0.5rem 1rem rgba(0,0,0,.15);
}

.btn-primary {
    background-color: #0d6efd;
    border-color: #0d6efd;
    padding: 0.75rem 1.5rem;
    font-weight: bold;
    transition: background-color 0.2s, border-color 0.2s;
}

.btn-primary:hover {
    background-color: #0b5ed7;
    border-color: #0a58ca;
}

.btn-secondary {
    padding: 0.75rem 1.5rem;
    font-weight: bold;
}

footer {
    background-color: #e9ecef;
}